没有用户交互android发送电子邮件

时间：2012-12-25 08:29:54

标签： android email email-attachments

我试图在没有用户互动的情况下发送电子邮件。每件事都有效，直到发送部分。

这是我正在使用的Gmailsender类中的sendemail功能

public void sendEmail() throws MessagingException 
{
    Log.i("check","start");

String host = "smtp.gmail.com";
String from = "blabla@gmail.com"; //sender email, this is our website email
String pass = "blablabla"; //password of sender email

Properties props = System.getProperties();
props.put("mail.smtp.starttls.enable", "true"); // added this line
props.put("mail.smtp.host", host);
props.put("mail.smtp.user", from);
props.put("mail.smtp.password", pass);
props.put("mail.smtp.port", "587");
props.put("mail.smtp.auth", "true");
Log.i("check","done pops ");


//creating session
Session session = Session.getDefaultInstance(props, null);
MimeMessage message = new MimeMessage(session);
message.setFrom(new InternetAddress(from));
Log.i("check","done sessions ");

InternetAddress toAddress;     
    toAddress = new InternetAddress(to);    
    message.addRecipient(Message.RecipientType.TO, toAddress);
    Log.i("check","add recipante ");

message.setSubject(subject);
message.setText("This is my app");


Log.i("check","transport");

Transport transport = session.getTransport("smtp");

//connecting..
Log.i("check","connecting");
transport.connect(host, from, pass);
//sending...
Log.i("check","wana send");
transport.sendMessage(message, message.getAllRecipients());
transport.close();
Log.i("check","sent");

}

日志“想发送”没有出现..

我从gmailSender创建对象的主要活动包含以下代码：

 send = (Button) this.findViewById(R.id.button1);
    send.setOnClickListener(new View.OnClickListener() {
        public void onClick(View v) {
            // TODO Auto-generated method stub
            try {   
                GMailSender sender = new GMailSender("blabla@gmail.com", "blablabla");
                Log.e("check", "test 1");
                sender.sendEmail() ;
                Log.e(DEBUG_TAG, "test 2");  
            } catch (Exception e) {   
                Log.e(DEBUG_TAG, "test 3");                  }

我收到“测试3”日志，这意味着发生了异常..

结果是电子邮件没有被发送而应用程序被卡住......我不知道有什么不对......

注意：我添加了互联网权限+我添加了jar文件

logcat是

12-25 12:55:00.774: E/check(1350): test 1
12-25 12:55:00.774: I/check(1350): start
12-25 12:55:00.774: I/check(1350): done pops 
12-25 12:55:00.774: I/check(1350): done sessions 
12-25 12:55:00.774: I/check(1350): add recipante 
12-25 12:55:00.779: I/check(1350): transport
12-25 12:55:00.789: I/check(1350): connecting
12-25 12:55:00.789: E/check(1350): test 3

这是check标签的整个logcat：

12-25 13:20:18.698: E/check(5547): test 1
12-25 13:20:18.698: I/check(5547): start
12-25 13:20:18.698: I/check(5547): done pops 
12-25 13:20:18.723: I/check(5547): done sessions 
12-25 13:20:18.723: I/check(5547): add recipante 
12-25 13:20:18.723: I/check(5547): transport
12-25 13:20:18.733: I/check(5547): connecting
12-25 13:20:18.758: E/check(5547): [Ljava.lang.StackTraceElement;@4193bb00
12-25 13:20:18.758: E/check(5547): android.os.NetworkOnMainThreadException
12-25 13:20:18.758: E/check(5547):  at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1099)
12-25 13:20:18.758: E/check(5547):  at java.net.InetAddress.lookupHostByName(InetAddress.java:391)
12-25 13:20:18.758: E/check(5547):  at java.net.InetAddress.getAllByNameImpl(InetAddress.java:242)
12-25 13:20:18.758: E/check(5547):  at java.net.InetAddress.getByName(InetAddress.java:295)
12-25 13:20:18.758: E/check(5547):  at java.net.InetSocketAddress.<init>(InetSocketAddress.java:105)
12-25 13:20:18.758: E/check(5547):  at java.net.InetSocketAddress.<init>(InetSocketAddress.java:90)
12-25 13:20:18.758: E/check(5547):  at com.sun.mail.util.SocketFetcher.createSocket(SocketFetcher.java:233)
12-25 13:20:18.758: E/check(5547):  at com.sun.mail.util.SocketFetcher.getSocket(SocketFetcher.java:189)
12-25 13:20:18.758: E/check(5547):  at com.sun.mail.smtp.SMTPTransport.openServer(SMTPTransport.java:1359)
12-25 13:20:18.758: E/check(5547):  at com.sun.mail.smtp.SMTPTransport.protocolConnect(SMTPTransport.java:412)
12-25 13:20:18.758: E/check(5547):  at javax.mail.Service.connect(Service.java:288)
12-25 13:20:18.758: E/check(5547):  at javax.mail.Service.connect(Service.java:169)
12-25 13:20:18.758: E/check(5547):  at com.example.sendmail.GMailSender.sendEmail(GMailSender.java:100)
12-25 13:20:18.758: E/check(5547):  at com.example.sendmail.MailSenderActivity$1.onClick(MailSenderActivity.java:31)
12-25 13:20:18.758: E/check(5547):  at android.view.View.performClick(View.java:3627)
12-25 13:20:18.758: E/check(5547):  at android.view.View$PerformClick.run(View.java:14329)
12-25 13:20:18.758: E/check(5547):  at android.os.Handler.handleCallback(Handler.java:605)
12-25 13:20:18.758: E/check(5547):  at android.os.Handler.dispatchMessage(Handler.java:92)
12-25 13:20:18.758: E/check(5547):  at android.os.Looper.loop(Looper.java:137)
12-25 13:20:18.758: E/check(5547):  at android.app.ActivityThread.main(ActivityThread.java:4511)
12-25 13:20:18.758: E/check(5547):  at java.lang.reflect.Method.invokeNative(Native Method)
12-25 13:20:18.758: E/check(5547):  at java.lang.reflect.Method.invoke(Method.java:511)
12-25 13:20:18.758: E/check(5547):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:980)
12-25 13:20:18.758: E/check(5547):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:747)
12-25 13:20:18.758: E/check(5547):  at dalvik.system.NativeStart.main(Native Method)

3 个答案:

答案 0 :(得分：5)

使用专为Android编写的JavaMail API。

import java.util.Date; 
import java.util.Properties; 
import javax.activation.CommandMap; 
import javax.activation.DataHandler; 
import javax.activation.DataSource; 
import javax.activation.FileDataSource; 
import javax.activation.MailcapCommandMap; 
import javax.mail.BodyPart; 
import javax.mail.Multipart; 
import javax.mail.PasswordAuthentication; 
import javax.mail.Session; 
import javax.mail.Transport; 
import javax.mail.internet.InternetAddress; 
import javax.mail.internet.MimeBodyPart; 
import javax.mail.internet.MimeMessage; 
import javax.mail.internet.MimeMultipart; 


public class Mail extends javax.mail.Authenticator { 
  private String _user; 
  private String _pass; 

  private String[] _to; 
  private String _from; 

  private String _port; 
  private String _sport; 

  private String _host; 

  private String _subject; 
  private String _body; 

  private boolean _auth; 

  private boolean _debuggable; 

  private Multipart _multipart; 


  public Mail() { 
    _host = "smtp.gmail.com"; // default smtp server 
    _port = "465"; // default smtp port 
    _sport = "465"; // default socketfactory port 

    _user = ""; // username 
    _pass = ""; // password 
    _from = ""; // email sent from 
    _subject = ""; // email subject 
    _body = ""; // email body 

    _debuggable = false; // debug mode on or off - default off 
    _auth = true; // smtp authentication - default on 

    _multipart = new MimeMultipart(); 

    // There is something wrong with MailCap, javamail can not find a handler for the multipart/mixed part, so this bit needs to be added. 
    MailcapCommandMap mc = (MailcapCommandMap) CommandMap.getDefaultCommandMap(); 
    mc.addMailcap("text/html;; x-java-content-handler=com.sun.mail.handlers.text_html"); 
    mc.addMailcap("text/xml;; x-java-content-handler=com.sun.mail.handlers.text_xml"); 
    mc.addMailcap("text/plain;; x-java-content-handler=com.sun.mail.handlers.text_plain"); 
    mc.addMailcap("multipart/*;; x-java-content-handler=com.sun.mail.handlers.multipart_mixed"); 
    mc.addMailcap("message/rfc822;; x-java-content-handler=com.sun.mail.handlers.message_rfc822"); 
    CommandMap.setDefaultCommandMap(mc); 
  } 

  public Mail(String user, String pass) { 
    this(); 

    _user = user; 
    _pass = pass; 
  } 

  public boolean send() throws Exception { 
    Properties props = _setProperties(); 

    if(!_user.equals("") && !_pass.equals("") && _to.length > 0 && !_from.equals("") && !_subject.equals("") && !_body.equals("")) { 
      Session session = Session.getInstance(props, this); 

      MimeMessage msg = new MimeMessage(session); 

      msg.setFrom(new InternetAddress(_from)); 

      InternetAddress[] addressTo = new InternetAddress[_to.length]; 
      for (int i = 0; i < _to.length; i++) { 
        addressTo[i] = new InternetAddress(_to[i]); 
      } 
        msg.setRecipients(MimeMessage.RecipientType.TO, addressTo); 

      msg.setSubject(_subject); 
      msg.setSentDate(new Date()); 

      // setup message body 
      BodyPart messageBodyPart = new MimeBodyPart(); 
      messageBodyPart.setText(_body); 
      _multipart.addBodyPart(messageBodyPart); 

      // Put parts in message 
      msg.setContent(_multipart); 

      // send email 
      Transport.send(msg); 

      return true; 
    } else { 
      return false; 
    } 
  } 

  public void addAttachment(String filename) throws Exception { 
    BodyPart messageBodyPart = new MimeBodyPart(); 
    DataSource source = new FileDataSource(filename); 
    messageBodyPart.setDataHandler(new DataHandler(source)); 
    messageBodyPart.setFileName(filename); 

    _multipart.addBodyPart(messageBodyPart); 
  } 

  @Override 
  public PasswordAuthentication getPasswordAuthentication() { 
    return new PasswordAuthentication(_user, _pass); 
  } 

  private Properties _setProperties() { 
    Properties props = new Properties(); 

    props.put("mail.smtp.host", _host); 

    if(_debuggable) { 
      props.put("mail.debug", "true"); 
    } 

    if(_auth) { 
      props.put("mail.smtp.auth", "true"); 
    } 

    props.put("mail.smtp.port", _port); 
    props.put("mail.smtp.socketFactory.port", _sport); 
    props.put("mail.smtp.socketFactory.class", "javax.net.ssl.SSLSocketFactory"); 
    props.put("mail.smtp.socketFactory.fallback", "false"); 

    return props; 
  } 

  // the getters and setters 
  public String getBody() { 
    return _body; 
  } 

  public void setBody(String _body) { 
    this._body = _body; 
  } 

  // more of the getters and setters ….. 
}

以下是如何在Android活动中使用Mail包装器的示例。

@Override 
public void onCreate(Bundle icicle) { 
  super.onCreate(icicle); 
  setContentView(R.layout.main); 

  Button addImage = (Button) findViewById(R.id.send_email); 
  addImage.setOnClickListener(new View.OnClickListener() { 
    public void onClick(View view) { 
      Mail m = new Mail("gmailusername@gmail.com", "password"); 

      String[] toArr = {"bla@bla.com", "lala@lala.com"}; 
      m.setTo(toArr); 
      m.setFrom("wooo@wooo.com"); 
      m.setSubject("This is an email sent using my Mail JavaMail wrapper from an Android device."); 
      m.setBody("Email body."); 

      try { 
        m.addAttachment("/sdcard/filelocation"); 

        if(m.send()) { 
          Toast.makeText(MailApp.this, "Email was sent successfully.", Toast.LENGTH_LONG).show(); 
        } else { 
          Toast.makeText(MailApp.this, "Email was not sent.", Toast.LENGTH_LONG).show(); 
        } 
      } catch(Exception e) { 
        //Toast.makeText(MailApp.this, "There was a problem sending the email.", Toast.LENGTH_LONG).show(); 
        Log.e("MailApp", "Could not send email", e); 
      } 
    } 
  }); 
}

答案 1 :(得分：2)

I am getting the "test 3" log which means that the exception happened..
The result is that the email is not sent and the app is stuck... I dont know what is the wrong..

盲目假设，只需将您的邮件发送到AsyncTask即可。我认为您的例外的原因是 NetworkOnMainThread ..

同时发布Exception的完整 stacktrace 。所以我们可以进一步帮助你..

<强>更新

我认为来自transport.connect(host, from, pass);的这一行sendEmail()会给你一个例外。

答案 2 :(得分：2)

如果使用“smtp.gmail.com”作为默认的smtp服务器，则会发出警告。

Google会强制您经常更改关联的电子邮件帐户密码，因为他们过于热心的“可疑活动”政策。实质上，它在短时间内将来自不同国家的重复smtp请求视为“可疑活动”。他们认为您（电子邮件帐户持有人）一次只能在一个国家/地区。

当谷歌系统检测到“可疑活动”时，它会阻止更多电子邮件，直到您更改密码。由于您将密码硬编码到应用程序中，因此每次发生这种情况时都必须重新发布应用程序，这并不理想。这对我来说每周发生3次，我甚至将密码存储在另一台服务器上，并且每次google强制我更改密码时都会动态提取密码。

因此，我建议使用众多免费smtp提供程序之一而不是“smtp.gmail.com”来避免此安全问题。使用相同的代码，但将“smtp.gmail.com”更改为新的smtp转发主机。

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